Question

Which of the following metals is obtained by leaching its ore with dilute cyanide solution?

Options

• Silver

• Titanium

• Vanadium

• Zinc

Answer 1

Silver

Explanation:

Silver is obtained by leaching its ore with a dilute cyanide solution in a process called the MacArthur-Forrest cyanide process. In this method, the silver ore (argentite) is treated with a dilute solution of sodium cyanide, which dissolves silver to form a soluble complex called sodium argentocyanide. Silver is then recovered from this complex by adding scrap zinc. This process is widely used for the extraction of silver from low-grade ores.